Summary

My package arrived pretty beat up and the plastic tee was missing. This part doesn't look like the factory part, but my sprinkler seems to like it.

Note that the nut was a bit tall, but seems to work OK. The clearance between the nut and the thread on the tee is also tight. It may be best to cut the nut a little shorter in your slicer, and scale the nut up by 1% in the x and y axes.

3mf file is included for Prusa Mk3/s users with 0.4mm nozzles.